Caption: Muybridge motion study. Series of early photographs showing the motion of a man performing a back-flip or back handspring. The consecutive images are numbered in order from 1 to 9 (upper left to lower right). These photographs were obtained by English photographer Eadweard J. Muybridge (1830-1904) in his pioneering work of 1878 and 1879, documenting the motion of animals. This work was carried out in Paulo Alto, California, USA. His most famous study was of a galloping horse, but he also studied the motions of humans. This photograph is from Muybridge's book 'The Attitudes of Animals in Motion' (1881).